Why light is not a raw material for photosynthesis?

Important Questions on Obtaining Food

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 1 - Obtaining Food>Investigating photosynthesis in pondweed>Q A1

The diagram shows how to collect the gas from pondweed plan a way of showing that the gas is Oxygen and not carbon dioxide.

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EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 1 - Obtaining Food>Investigating photosynthesis in pondweed>Q A2

Make a prediction and explain why oxygen evolves during the process of photosynthesis and not carbon dioxide.

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 1 - Obtaining Food>Investigating photosynthesis in pondweed>Q A3

Explain, why do you need a lamp while doing the laboratory experiment by below showed setup, which proves the evolution of oxygen gas during the process of photosynthesis?

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EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 1 - Obtaining Food>Investigating photosynthesis in pondweed>Q A4

Why do we use a glass funnel in the experiment and not a white plastic one, in the experiment that proves that oxygen is evolved during the process of photosynthesis as shown below?

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